#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main() {
    srand(time(NULL)); // 设置随机数种子

    char random_char1, random_char2, random_char3;

    for (int i = 0; i <3 ; i++) {
        random_char1 = rand() % 25 + 'a';
        random_char2 = rand() % 14 + '!';
        random_char3 = rand() % 10 + '0';
    }
return 0;
}